What is the correct chemical formula of a compound composed of potassium ions and phophate ions?

Fill in the orbital diagram for a ground state oxygen (O) atom: Which statement correctly describes the filling of the 2p orbitals?

What is the new boiling point (in °C) of a 2.10m aqueous solution of MgCl2? Hint: The molal boiling point elevation constant (Kb) of water is 0.512°C/m.

Which particle depicted below would have the following complete chemical symbol?

Solutions of Fe(NO3)3 (aq) and KOH (aq) are mixed together. What is/are the spectator ion(s) in this reaction? Hint:  Write the molecular and complete ionic equations.

Which of the following correctly describes the central atom in the chlorate ion (ClO₃⁻) ? 

A 0.100 m solution of which one of the following solutes will have the lowest freezing point? (largest FP depression) Hint: Assume all solutes fully dissolve in water. 

Which of the following correctly describes the central atom in sulfur difluoride (SF₂)?

In the molecule ethyl acetate, three representative bond angles are labeled as follows: Which of the following sets best represents the approximate values of these three bond angles? Hint:  lone pairs of electrons are are not depicted on the structure but may be needed to complete an octet. Be sure to include the lone pairs of electrons when determining the bond angles.

Which is mismatched?